syncthing-ui

What is syncthing-ui?

Syncthing UI is the browser-based control panel bundled with the Syncthing core. It centralizes configuration, monitoring, and administration of a private, peer-to-peer sync network. The interface runs alongside the Syncthing daemon, presenting device lists, folder shares, transfer progress, and health metrics in a single, local web page.

The UI communicates with the Syncthing core through REST-like endpoints and WebSocket streams to display live status, shares, and device health. It is served by the running daemon and updates in real time, without requiring a separate server process.

Is syncthing-ui Safe?

Yes. Syncthing UI is a legitimate part of the Syncthing project and is designed to run locally with the daemon. When obtained from official sources, it does not exfiltrate data or execute remote code. Ensure you download from the official Syncthing website or trusted package managers, keep the daemon updated, and access the UI only over trusted network paths (prefer localhost or properly TLS-protected remote access).

Is syncthing-ui a Virus?

No, syncthing-ui is not a virus. It is the official web interface for Syncthing. However, like any software component, you should verify integrity after download, ensure digital signatures match the publisher, and avoid running modified binaries. If you see unexpected behavior, re-download from the official source and compare checksums.

How to Verify Legitimacy

1. Check File Location: On Windows, verify syncthing-ui components reside under C:\Program Files\Syncthing or the user-local Syncthing directory; on Linux, verify binaries under /usr/bin or the installed prefix. Ensure paths match your official deployment.
2. Verify Digital Signature: For Windows builds, check the Authenticode signature of syncthing.exe/syncthing-ui artifacts using Get-AuthenticodeSignature in PowerShell and confirm the publisher is Syncthing developers.
3. Check File Hash: Compute the SHA256 hash of the syncthing binary and compare it to the official hash published on the Syncthing release page to confirm integrity.
4. Scan for Malware: Run a malware scan with Windows Defender, ClamAV, or your antivirus to ensure no tampered components are present and that the UI artifacts are clean.

Why is it Running?

Reasons it's running:

• Local control plane: The syncthing-ui provides a centralized, browser-based control surface for managing devices and folders without external servers, directly interfacing with the running Syncthing daemon.
• Real-time status and logs: The UI uses WebSocket streams to present live transfer progress, device health, and sync events, enabling immediate responses to changes in the network.
• Cross-platform accessibility: Designed to work consistently across Windows, macOS, and Linux, the UI adapts to different environments while maintaining the same workflow and visuals.
• Unified management of shares: From the UI you can add, edit, or remove folders and configure devices, all reflected in real time without restarting the daemon.
• Secure by default when local: Access is intended for localhost; when remote access is needed, TLS, authentication, and access controls should be configured to protect the control surface.

Can I Disable or Remove It?

Common Problems

Common Causes & Solutions

• : Ensure the Syncthing daemon is running, the UI port (default 8384) is reachable, and there are no browser extensions blocking WebSocket connections. Check console logs for WebSocket errors and update to the latest Syncthing release.
• : Verify that the daemon is listening on 127.0.0.1:8384 or your chosen port. Check firewall rules, confirm that you are using the correct URL, and restart the Syncthing service if needed.
• : Clear browser cache, ensure WebSocket connections are not blocked, and verify that the Syncthing daemon is up-to-date. Check for multiple UI instances fighting for the same port.
• : Examine the number of folders/devices synchronized; reduce watched folders if possible, ensure hardware meets requirements, and consider excluding UI assets from antivirus scans to prevent overhead.
• : Confirm device IDs, sharing permissions, and network reachability. Use the UI to generate share invitations or manually enter device IDs to establish a bridge, ensuring both sides trust each other.
• : Configure TLS certificates for the UI, restrict access to trusted networks, and ensure reverse proxy settings (if used) terminate TLS correctly to avoid mixed-content warnings.

Related Processes